Free Printable Topic 1: Physical quantities and measurement (2022)

1.

The equation below is dimensionally correct. P and v represent pressure and velocity respectively. the unit of a is similar to that of?

P\ +\ av^2\ =\ b

a)

Mass

b)

Volume

c)

Density

d)

Force

2.

2. What do scalar and vector have in common?

a)

Scalar and vector both have magnitude and direction

b)

Scalar and vector both have direction

c)

Scalar and vector both have magnitude

d)

Scalar and vector are not physical quantity

3.

3. The rate at which velocity changes with time

a)

Speed

b)

Velocity

c)

Acceleration

d)

Free fall

4.

4. How fast an object is moving and in which direction is the definition of

a)

Speed

b)

Acceleration

c)

Velocity

d)

Free Fall

5.

5.Which of the following is a vector

a)

length

b)

volume

c)

velocity

d)

work

6.

6.An example of scalar quantity is

a)

Displacement

b)

Speed

c)

Velocity

d)

Torque

7.

Dimensions for acceleration due to gravity is

a)

$MLT^{-1}$

b)

$LT^{-1}$

c)

$LT^{-2}$

d)

$M^{ }LT^{-2}$

8.

Dimension below refer to which quantity?

LT^{-1}

a)

acceleration

b)

velocity

c)

momentum

d)

energy

9.

11.Which one of the following is NOT regarded as a basic quantity in Physics?

a)

Length

b)

Mass

c)

Time

d)

Weight

10.

The dimension of force is

a)

$MLT^{-1}$

b)

$MLT^{-2}$

c)

$ML^{-1}T^{ }$

d)

$ML^{-1}T^2$

11.

Suppose A = BC, where A has the dimension L/M and C has the dimension L/T. Then B has the dimension:

a)

$T/M$

b)

$L^2/TM$

c)

$\frac{TM}{L^2}$

d)

$\frac{L^2T}{M}$

12.

Select the list which contains only SI basic units

a)

liter, meter, second, watt

b)

joule, kelvin, kilogram, watt

c)

kilogram, kelvin, meter, second

d)

joule, newton, second, watt

13.

All of the following are base units of the SI system except:

a)

kilogram

b)

kelvin

c)

meter

d)

volt

14.

The base SI unit of time is

a)

Hour

b)

Minute

c)

Second

d)

Millisecond

15.

How many basic units does the SI system have?

a)

Four

b)

Five

c)

Seven

d)

Ten

16.

Which of the following is a derived quantity:

a)

Force

b)

Mass

c)

Length

d)

Time

17.

If vector A is acting along y-axis, its y-component is:

a)

$A$

b)

$A\ \cos\ \theta$

c)

$A\ \sin\ \theta$

d)

$Zero$

18.

A force of 10 N is acting along x-axis, its component along y-axis is

a)

$10\ N$

b)

$5\ N$

c)

$8.66\ N$

d)

$Zero$

19.

The base SI unit of mass is the

a)

Microgram

b)

Miligram

c)

Kilogram

d)

Gram

20.

10mm is equal to

a)

1cm

b)

1m

c)

1dm

d)

10cm

21.

The _______ of two or more vectors is the sum of the vectors.

a)

components

b)

scalar

c)

resultant

d)

direction

22.

Resolve the vector into its vertical component (y-component)

a)

-20 m

b)

(-20 cos 70) m

c)

(20 cos 70) m

d)

(-20 sin 70) m

23.

Resolve the vector into its horizontal component (x-component)

a)

20 m

b)

0 m

c)

(20 cos 70) m

d)

(20 sin 70) m

24.

Resolve the vector into its horizontal component (x-component)

a)

8 N s

b)

-8 N s

c)

0 N s

d)

-8 N

25.

Resolve the vector into its horizontal component (x-component)

a)

0 N

b)

20 N

c)

-20 N

d)

10 N

26.

Find the length of the missing side.

a)

17 cm

b)

22 cm

c)

15 cm

d)

13 cm

27.

If a boomerang is thrown 20 m in a straight line and returns exactly to the spot it was thrown what is its displacement?

a)

20

b)

0

c)

40

d)

-20

28.

What equation is used to find the direction of vector?

a)

$\sqrt[]{R_x^{2\ }+R_y^2}$

b)

$\tan\ \theta\ =\ \frac{Rx}{Ry}$

c)

$\tan\ \theta\ =\frac{Ry}{Rx}$

d)

$\sin\ \theta\ =\ \frac{Rx}{R_{y\ }}$

29.

Resolve the vector into its x-component

a)

14cos(30)

b)

14sin(30)

c)

-14cos(30)

d)

-14sin(30)

30.

Resolve the vector into its y-component

a)

14cos(30)

b)

14sin(30)

c)

-14cos(30)

d)

-14sin(30)

31.

What is the direction of the resultant force?

a)

Above negative x-axis

b)

Below negative x-axis

c)

Above positive x-axis

d)

Below negative x-axis

32.

State the direction of the vector shown

a)

Above positive x-axis

b)

Below positive x- axis

c)

Above negative x-axis

d)

Below negative x-axis

33.

State the direction of the vector shown

a)

Above positive x-axis

b)

Below positive x-axis

c)

Above negative x-axis

d)

Below negative x-axis

34.

1. Dimension can be defined as

a)

a physical quantity

b)

a technique or method which the physical quantity can be expressed in terms of combination of basic quantities

c)

algebraic quantities through the procedure of dimensional analysis

d)

a combination of basic quantities

35.

The uses of dimensional analysis are as below, EXCEPT

a)

to determine the unit of the physical quantity.

b)

to determine whether a physical equation is dimensionally correct or not by using the principle of homogeneity

c)

to derive/construct a physical equation.

d)

to resolve vector

Topic 1: Physical quantities and measurement (2022)

Total questions: 35

Worksheet time: 27mins

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